/**
 *    Copyright (C) 2008, 2009  Victor Smirnov <aist11@gmail.com>
 *
 *    This program is free software; you can redistribute it and/or modify
 *    it under the terms of the GNU General Public License as published by
 *    the Free Software Foundation; either version 3 of the License, or
 *    (at your option) any later version.
 *
 *    This program is distributed in the hope that it will be useful,
 *    but WITHOUT ANY WARRANTY; without even the implied warranty of
 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *    GNU General Public License for more details.
 *
 *    You should have received a copy of the GNU General Public License along
 *    with this program; if not, write to the Free Software Foundation, Inc.,
 *    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 *    See LICENSE.exceptions in the root folder of this project for possible
 *    exceptions
 *
 */

package ru.teleology.cubefs.api.reflection.metadata;

import ru.teleology.cubefs.api.reflection.NativeType;
import ru.teleology.cubefs.api.reflection.Type;
import ru.teleology.cubefs.api.reflection.TypeSystem;
import ru.teleology.cubefs.api.reflection.Types;


@NativeType(name = Types.METADATA_GROUP_TYPE)
public class MetadataGroup extends Metadata implements IMetadataGroup {

	private static final Type myType = TypeSystem.find(Types.METADATA_GROUP_TYPE);
	private Operations operations = (Operations) myType.proxy(this);
	
	public MetadataGroup(long handle) {
		super(handle);
	}

	public int Size() {
		return operations.Size();
	}
    
	public Metadata GetItem(int idx) {
		return operations.GetItem(idx);
    }
	
	public Metadata findField(String name) {
		return find(this, name, new CntHolder(0));
	}
	
	public Metadata findField(String name, int cnt) {
		return find(this, name, new CntHolder(cnt));
	}
	
	private Metadata find(MetadataGroup group, String name, CntHolder cnt) {
		int size = group.Size();
		for (int c = 0; c < size; c++) {
			Metadata child = group.GetItem(c);
			if (name.equals(child.Name())) {
				if (cnt.cnt == 0) {
					return child;
				}
				else {
					cnt.cnt--;
				}
			}
			else if (child instanceof MetadataGroup){
				MetadataGroup group0 = (MetadataGroup) child;
				Metadata child0 = find(group0, name, cnt);
				if (child0 != null) {
					return child0;
				}
			}
		}
		return null;
	}
	
	
	public interface Operations {
		int Size();
	    Metadata GetItem(int idx);
	}
	
	private static class CntHolder {
		int cnt;
		
		public CntHolder(int cnt) {
			this.cnt = cnt;
		}
	}
}
